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NDA 1 2025 GAT, question 140

Topic: Physics

Q140

A system that does NOT allow exchange of heat with its surrounding is called

  1. (a) Adiabatic systemCorrect answer
  2. (b) Non-adiabatic system
  3. (c) Equilibrium system
  4. (d) Non-equilibrium system

Solution.

Answer: (a) Adiabatic system

  1. An adiabatic system has no heat transfer across its boundary.
  2. Work may still cross the boundary, so adiabatic does not necessarily mean isolated, and its temperature need not remain constant.